On 11/7/22, Charles Machalow <csm10...@gmail.com> wrote:
> So would you be for specific methods to check if a given path is a
> junction?
I'd prefer for ismount() to be modified to always return true for a
junction. This would be a significant rewrite of the current
implementation, which is only true for a junction that targets a
system volume mount point (i.e. "\\?\Volume{GUID}\"). Of course
ismount() wouldn't be true for only junctions. It's also be true for
the root path of any drive, device, or UNC share if it's an existing
filesystem directory.
Implementing a function that checks for only a junction is simple
enough. For example:
def isjunction(path):
"""Test whether a path is a junction.
"""
try:
st = os.lstat(path)
except (OSError, ValueError, AttributeError):
return False
return bool(st.st_reparse_tag & stat.IO_REPARSE_TAG_MOUNT_POINT)
To be completely certain, sometimes st_file_attributes is also checked
for stat.FILE_ATTRIBUTE_REPARSE_POINT. But a filesystem that sets a
reparse point on a directory without also setting the latter file
attribute would be dysfunctional.
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